Mechanical thermometer with reliable structure

Abstract

The mechanical thermometer with the reliable structure comprises a dial plate and a temperature probe connected to the rear end portion of the dial plate, the dial plate comprises a transparent panel, a bottom shell, a temperature indicating dial and a pointer, the temperature indicating dial and the pointer are located between the transparent panel and the bottom shell, an inner cavity of the temperature probe is provided with a temperature wire connected with the pointer, and the bottom shell is provided with a through hole for the temperature probe to penetrate through. The temperature probe is characterized in that the temperature probe is provided with a metal stud with external threads, the outer end of the metal stud is provided with a welding raised head capable of penetrating out of the through hole of the bottom shell and extending outwards, and a welding sealing structure is formed among the outer end of the temperature probe, the outer end of the metal stud and the periphery of the through hole of the bottom shell. When the electric kettle is installed on a kettle body for use, the water temperature in the kettle can be accurately measured through the temperature probe extending into the kettle body, the heat resistance is good, the temperature probe is welded to the bottom shell in a sealed mode, the sealing structure is reliable, the phenomenon that the structure is loosened and leaks water due to the fact that the temperature probe is driven to rotate when a locking nut is rotated is avoided, and the service life of the electric kettle is prolonged. The use is safe and the practicability is strong.

Description

Technical Field

[0001] The utility model relates to the technical field of vessel thermometers, in particular to a mechanical thermometer with reliable structure. Background Art

[0002] Electric kettles are small household appliances that are often used in people's daily lives and work. As people's living standards improve, their requirements for kettle usage are also increasing. For example, when making tea or coffee, users often pay attention to the water temperature, sometimes as long as it is around 80-90 degrees Celsius, and 100 degrees Celsius is not required. For this reason, kettles with thermometers that can measure temperature have emerged. There are also many kettle structures with thermometers in existing products. The structural rationality of the thermometer on the kettle structure is mainly considered from two aspects: one is its sealing performance. Good sealing performance is the key to ensuring water quality safety and its own service life. The other is its heat resistance. Heat resistance is the key to accurate temperature measurement and service life. The thermometers on existing kettle products are mostly electronic thermometers. Electronic thermometers have poor heat resistance. Long-term heat exposure will cause inaccurate temperature measurement and short service life. For this reason, many kettle products use mechanical thermometers instead, which have good heat resistance. However, the mechanical thermometers on existing kettle products mostly use a screw-connected and waterproof sealing ring structure between the temperature-sensing column (also called temperature probe tube or probe tube) and the dial bottom shell, or a structure riveted with a waterproof sealing ring and a riveted part. For example, a new mechanical thermometer disclosed in Chinese patent No. CN201821317313131.X adopts a riveted through-hole in the middle of the dial bottom shell, a riveted part is provided in the riveted through-hole, and the temperature probe connected to the pointer is riveted to the bottom shell through the riveted hole of the riveted part, and a second waterproof ring is provided in the riveted hole of the riveted part. The thermometer with this structure is difficult to meet the requirements of the majority of consumers because there is a locking nut on the temperature probe tube when it is installed and locked on the kettle body. Tightening the locking nut often causes the temperature probe tube and the bottom shell to rotate relative to each other, causing the riveted structure between the temperature probe tube and the bottom shell to loosen and leak. Summary of the Invention

[0003] The purpose of the present invention is to provide a mechanical temperature gauge with good sealing performance, good heat resistance, long service life, simple structure and reliable structure in response to the above problems and shortcomings.

[0004] The technical solution of the present utility model is achieved as follows:

[0005] The mechanical temperature gauge of the utility model has a reliable structure and includes a dial and a temperature probe connected to the rear end of the dial. The dial includes a transparent panel, a bottom shell, and a temperature indicator plate and a pointer located between the transparent panel and the bottom shell. The inner cavity of the temperature probe is provided with a temperature wire connected to the pointer. The bottom shell is provided with a through hole for the temperature probe to pass through. The utility model is characterized in that: a metal stud with an external thread is provided on the temperature probe, and a welded sealing structure is formed between the outer end of the temperature probe, the outer end of the metal stud, and the periphery of the through hole in the bottom shell.

[0006] Because the bottom plate of the dial bottom shell is relatively thin (generally 0.3mm), in order to prevent the bottom shell of the dial from being easily penetrated during flat-to-flat welding, which makes it difficult to achieve welding sealing and water leakage, the outer end of the metal stud is provided with a welding boss that can pass through the hole of the bottom shell and extend outward. The welding sealing structure is mainly achieved by hot-melting the welding boss to achieve sealing welding between the temperature probe, the metal stud and the bottom shell. Since the present invention directly provides a welding boss for welding on the metal stud, it is possible to provide excess material to achieve welding sealing by melting the welding boss during welding, effectively avoiding the occurrence of welding penetration of the bottom shell and water leakage during flat welding. The welding surface height of the welding sealing structure in this application is preferably slightly higher than the bottom plate of the bottom shell, so that the welding sealing structure is more reliable. The welding surface height is generally 0.3-0.6mm. In order to further enhance the structural reliability of the present invention, it is preferred that the diameter of the welding protrusion is smaller than the diameter of the metal stud, so that a limiting shoulder is formed on the metal stud and is placed on the bottom surface of the bottom shell.

[0007] Furthermore, the outer end of the bottom shell of the dial is riveted onto the transparent panel to form an inward folding limit seal. Alternatively, the dial further includes an annular dial cover that cooperates with the outer end of the bottom shell, and the outer end of the dial cover is riveted onto the transparent panel to form an inward folding limit seal.

[0008] To ensure better airtightness of the dial, a sealing ring is provided between the transparent panel and the bottom shell. Preferably, the bottom shell's inner cavity is provided with a shoulder, the temperature indicator dial is mounted on this shoulder, and the sealing ring is tightly pressed between the periphery of the temperature indicator dial and the transparent panel. Furthermore, the inner end surface of the transparent panel is provided with inner stoppers near the outer edge, and the sealing ring is positioned between the periphery of the temperature indicator dial, the inner stoppers of the transparent panel, and the inner wall of the bottom shell.

[0009] The present invention forms a welded seal structure between the outer end of the temperature probe, the outer end of the metal stud, and the periphery of the perforation of the bottom shell. This allows the present invention, when installed on a kettle body, to accurately measure the water temperature within the kettle through the temperature probe extending into the kettle body while also exhibiting excellent heat resistance. Furthermore, the temperature probe is seal-welded to the bottom shell, resulting in a secure and reliable seal. Tightening the locking nut will prevent the temperature probe from rotating and causing water leakage, making the present invention safe and practical. This effectively addresses the problem of loose screwed or riveted connections between the temperature probe and the bottom shell, which can cause water leakage in conventional thermometers. Furthermore, the present invention is easy to install, aesthetically pleasing, and high-quality. Furthermore, the present invention further enhances the reliability of the welded seal structure by providing a welded protrusion structure at the outer end of the metal stud of the temperature probe.

[0010] The present invention will be further described below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic cross-sectional view of the first embodiment of the present invention;

[0012] Figure 2 for Figure 1 Schematic diagram of the assembly structure of the temperature probe and the dial before welding and sealing;

[0013] Figure 3 for Figure 1 Schematic diagram of the cross-section structure before the temperature probe and the dial are welded and sealed;

[0014] Figure 4 This is a schematic cross-sectional view of the second embodiment of the present invention;

[0015] Figure 5 for Figure 4 Schematic diagram of the assembly structure before welding and sealing. DETAILED DESCRIPTION

[0016] like Figure 1-Figure 5As shown, the structurally reliable mechanical thermometer of the present invention comprises a dial 1 and a temperature probe 2 connected to the rear end of the dial 1. The dial 1 comprises a transparent panel 11, a bottom shell 12, and a temperature indicator plate 13 and a pointer located between the transparent panel 11 and the bottom shell 12. The temperature probe 2 has a temperature wire 21 connected to the pointer within its cavity. The bottom shell 12 has a through-hole for the temperature probe 2 to pass through. The temperature probe 2 is provided with a metal stud 3 with an external thread. After the temperature probe passes through the kettle wall from the outside, the mechanical thermometer is securely connected to the kettle by screwing in a locking nut and the metal stud. To ensure a reliable seal between the temperature probe and the bottom shell, a welded sealing structure 4 is formed between the outer end of the temperature probe 2, the outer end of the metal stud 3, and the periphery of the through-hole in the bottom shell 12. Because the temperature probe and the bottom shell are securely connected via a sealed weld, the seal is strong and reliable. Therefore, when the locking nut is tightened on the metal stud, causing the temperature probe to rotate, the probe rotates synchronously with the bottom shell, rather than rotating relative to the bottom shell. Therefore, there is no risk of loosening and leaking, resulting in a strong waterproof seal. This effectively solves the problem of existing thermometers that can cause the screwed or riveted connection between the probe and the bottom shell to loosen and leak when the locking nut is tightened, causing the probe to rotate. To further enhance the reliability of the seal, the outer end of the metal stud 3 is provided with a weld tab 31 that extends outward through a hole in the bottom shell 12. The weld seal 4 primarily achieves a sealed weld between the temperature probe 2, the metal stud 3, and the bottom shell 12 by heat-melting the weld tab 31. Furthermore, the diameter of the weld tab 31 is smaller than that of the metal stud 3, forming a stopper on the metal stud 3 that rests on the bottom surface of the bottom shell 12.

[0017] In addition, there are two packaging structures of the dial in the present invention. The first is that the outer end of the bottom shell 12 of the dial 1 is riveted on the transparent panel 11 to form an inner folding limit sealing edge. Figure 1-Figure 3 The second type is that the dial 1 further includes a ring-shaped dial cover 15 that cooperates with the outer end of the bottom shell 12, and the outer end of the dial cover 15 is riveted on the transparent panel 11 to form an inner folding limit sealing edge. Figure 4-Figure 5 As shown. To prevent external water or moisture from the air from entering the dial through the gap between the riveted inward folding limit seal and the transparent panel, and to improve the sealing performance of the dial, a sealing ring 7 is provided between the transparent panel 11 and the bottom shell 12. The inner cavity of the bottom shell 12 is provided with a shoulder 121, and the temperature indicating dial 13 is mounted on the shoulder 121. The sealing ring 7 is tightly pressed between the periphery of the temperature indicating dial 13 and the transparent panel 11. It is further preferred that the inner end surface of the transparent panel 11 is provided with an inner limit foot 111 near the outer edge, and the sealing ring 7 is located between the periphery of the temperature indicating dial 13, the inner limit foot 111 of the transparent panel 11, and the inner wall of the bottom shell 12.

[0018] The utility model can be widely applied to electric heating appliances that require temperature measurement, such as electric kettles and coffee pots.

[0019] In the description of this patent, it should be understood that the terms "center", "up", "down", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on this patent.

[0020] Although the present invention is described with reference to specific embodiments, such description is not intended to limit the present invention. Other variations of the disclosed embodiments are readily apparent to those skilled in the art, and such variations are intended to fall within the scope of the claims.

Claims

1. A mechanical thermometer with a reliable structure, comprising a dial (1), a temperature probe (2) connected to the rear end of the dial (1), the dial (1) comprising a transparent panel (11), a bottom shell (12), and a temperature indicating plate (13) and a pointer located between the transparent panel (11) and the bottom shell (12), the inner cavity of the temperature probe (2) being provided with a temperature wire (21) connected to the pointer, the bottom shell (12) being provided with a through hole for the temperature probe (2) to pass through, and characterized in that: The temperature probe (2) is provided with a metal stud (3) with external threads, and a welding sealing structure (4) is formed between the outer end of the temperature probe (2), the outer end of the metal stud (3) and the periphery of the perforation of the bottom shell (12).

2. The reliable mechanical temperature gauge according to claim 1, characterized in that: The outer end of the metal stud (3) is integrally provided with a welding protrusion (31) that can pass through the hole of the bottom shell (12) and extend outward. The welding sealing structure (4) is mainly achieved by hot-melting the welding protrusion (31) to achieve sealing welding between the temperature probe (2), the metal stud (3) and the bottom shell (12).

3. The reliable mechanical temperature gauge according to claim 2, characterized in that: The diameter of the welding protrusion (31) is smaller than the diameter of the metal stud (3), so that a limiting shoulder is formed on the metal stud (3) and is placed on the bottom surface of the bottom shell (12).

4. The structurally reliable mechanical temperature gauge according to claim 1, characterized in that: The outer end of the bottom shell (12) of the dial (1) is riveted onto the transparent panel (11) to form an inward folding limit sealing edge.

5. The reliable mechanical temperature gauge according to claim 1, characterized in that: The dial (1) further comprises an annular dial face shell (15) which cooperates with the outer end of the bottom shell (12); the outer end of the dial face shell (15) is riveted onto the transparent panel (11) to form an inward folding limit sealing edge.

6. The structurally reliable mechanical temperature gauge according to claim 1, characterized in that: A sealing ring (7) is provided between the transparent panel (11) and the bottom shell (12).

7. The structurally reliable mechanical temperature gauge according to claim 6, characterized in that: The inner cavity of the bottom shell (12) is provided with a shoulder (121), the temperature indicating disk (13) is mounted on the shoulder (121), and the sealing ring (7) is tightly pressed between the periphery of the temperature indicating disk (13) and the transparent panel (11).

8. The structurally reliable mechanical temperature gauge according to claim 6, characterized in that: An inner limit foot (111) is provided on the inner end surface of the transparent panel (11) near the outer edge, and the sealing ring (7) is located between the periphery of the temperature indicating disk (13), the inner limit foot (111) of the transparent panel (11), and the inner cavity wall of the bottom shell (12).

Images